using System;class ReadAndPrint3Integer{	static void Main()	{		//First method		Console.WriteLine("Enter first number: ");		String str = Console.ReadLine();		int firstNumber = 0;		bool isTrue = Int32.TryParse(str, out firstNumber);		//2nd method		Console.Write("Second number: ");		int secondNumber = Int32.Parse(Console.ReadLine());		//3rd method		Console.Write("Third number: ");		String str3rdnumber = Console.ReadLine();		int thirdNumber = Convert.ToInt32(str3rdnumber);		int sum = firstNumber+ secondNumber+ thirdNumber;		Console.WriteLine("\n{0} + {1} + {2} = {3}", firstNumber, secondNumber, thirdNumber, sum );							}}